Filter assembly



FIG. 1 is a top plan view of a blood filter showing my new design;

FIG. 2 is a side-elevational view of one side thereof; the opposite sidebeing the same as the side as shown;

FIG. 3 is an end-elevational view thereof; the opposite end beingsimilar to the end shown, and

FIG. 4 is a view of the bottom thereof.

The broken lines are shown for illustrative purposes only.

The ornamental design for a filter assembly, substantially as shown anddescribed.